Write the equation of a circle with center (7,3) and radius 3

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

What is the value of x when x + 7 = 21?

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer